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Article: Constraints on extra-dimensions and variable constants from cosmological gamma-ray bursts

TitleConstraints on extra-dimensions and variable constants from cosmological gamma-ray bursts
Authors
KeywordsBursts-radiation mechanisms
Cosmology-extra-dimensions
Gamma rays
Poton delay
Issue Date2005
PublisherSpringer Verlag Dordrecht. The Journal's web site is located at http://springerlink.metapress.com/openurl.asp?genre=journal&issn=0004-640X
Citation
Astrophysics And Space Science, 2005, v. 297 n. 1-4, p. 319-326 How to Cite?
AbstractThe observation of the time delay between the soft emission and the high-energy radiation from cosmological gamma ray bursts can be used as an important observational test of multi-dimensional physical theories. The main source of the time delay is the variation of the elec1tromagnetic coupling, due to dimensional reduction, which induces an energy dependence of the speed of light. For photons with energies around 1 TeV, the time delay could range from a few seconds in the case of Kaluza-Klein models to a few days for models with large extra-dimensions. Based on these results we suggest that the detection of the 18-GeV photon ∼4500 s after the keV/MeV burst in GRB 940217 provides a strong evidence for the existence of extra-dimensions. The time delay of photons, if observed by the next generation of high energy detectors, like, for example, the SWIFT and GLAST satellite based detectors, or the VERITAS ground-based TeV gamma-ray instrument, could differentiate between the different models with extra-dimensions. © Springer Science + Business Media, Inc. 2005.
Persistent Identifierhttp://hdl.handle.net/10722/91788
ISSN
2015 Impact Factor: 1.678
2015 SCImago Journal Rankings: 0.667
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHarko, Ten_HK
dc.contributor.authorCheng, KSen_HK
dc.date.accessioned2010-09-17T10:26:38Z-
dc.date.available2010-09-17T10:26:38Z-
dc.date.issued2005en_HK
dc.identifier.citationAstrophysics And Space Science, 2005, v. 297 n. 1-4, p. 319-326en_HK
dc.identifier.issn0004-640Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/91788-
dc.description.abstractThe observation of the time delay between the soft emission and the high-energy radiation from cosmological gamma ray bursts can be used as an important observational test of multi-dimensional physical theories. The main source of the time delay is the variation of the elec1tromagnetic coupling, due to dimensional reduction, which induces an energy dependence of the speed of light. For photons with energies around 1 TeV, the time delay could range from a few seconds in the case of Kaluza-Klein models to a few days for models with large extra-dimensions. Based on these results we suggest that the detection of the 18-GeV photon ∼4500 s after the keV/MeV burst in GRB 940217 provides a strong evidence for the existence of extra-dimensions. The time delay of photons, if observed by the next generation of high energy detectors, like, for example, the SWIFT and GLAST satellite based detectors, or the VERITAS ground-based TeV gamma-ray instrument, could differentiate between the different models with extra-dimensions. © Springer Science + Business Media, Inc. 2005.en_HK
dc.languageengen_HK
dc.publisherSpringer Verlag Dordrecht. The Journal's web site is located at http://springerlink.metapress.com/openurl.asp?genre=journal&issn=0004-640Xen_HK
dc.relation.ispartofAstrophysics and Space Scienceen_HK
dc.subjectBursts-radiation mechanismsen_HK
dc.subjectCosmology-extra-dimensionsen_HK
dc.subjectGamma raysen_HK
dc.subjectPoton delayen_HK
dc.titleConstraints on extra-dimensions and variable constants from cosmological gamma-ray burstsen_HK
dc.typeArticleen_HK
dc.identifier.emailHarko, T: harko@hkucc.hku.hken_HK
dc.identifier.emailCheng, KS: hrspksc@hkucc.hku.hken_HK
dc.identifier.authorityHarko, T=rp01333en_HK
dc.identifier.authorityCheng, KS=rp00675en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s10509-005-7670-2en_HK
dc.identifier.scopuseid_2-s2.0-17744380241en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-17744380241&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume297en_HK
dc.identifier.issue1-4en_HK
dc.identifier.spage319en_HK
dc.identifier.epage326en_HK
dc.identifier.isiWOS:000228545100033-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridHarko, T=7006485783en_HK
dc.identifier.scopusauthoridCheng, KS=9745798500en_HK
dc.identifier.citeulike166728-

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